Used to express agreement or consent; equivalent to "okay" or "fine"

small advantages; benefits that one should not have gotten

unexpectedly; surprisingly; used to show that something is contrary to what was thought

To pretend to be aggrieved or to have suffered a loss even after receiving a clear benefit; often used in the phrase 得了便宜还卖乖 dé​le​pián​yi​hái​mài​guāi